View surface's borders only

Hi,
I have received a file (the surface in the left was already in it) and I made a new surface (the one on the right), and I was wondering why the existed surface only shows it’s borders and how to do that?

You can suppress the isocurves for an individual object via its properties panel

Regards
Jeremy

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Thank you

You can also turn them off for all objects in all models via the display mode options (but they are quite useful at times so this probably isn’t a great idea):

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That’s a way better. appreciate your help @jeremy5 . I am doing an energy simulation which use a surface as a reference, so when printing the view in order to make a presentation of the results it’s kinda annoying keeping the isocurves and indeed they are useful.